Disturbance Rejection Controller Design Based on Sensitivity Function Notching
نویسنده
چکیده
This paper presents a feed-forward control scheme for rejecting stochastic narrow band disturbances. The effect of this scheme manifests itself as a tunable notch on the sensitivity transfer function frequency response, where the target frequency, width, and depth of the notch can be set by prescribed design parameters. This approach is based on employing least mean square adaptive control that subsequently resulted in a linear time invariant (LTI) controller. The appeal of this approach includes the ability to directly notch the sensitivity function and ease of implementation on digital control platforms. This scheme was used in actual high volume hard disk drive (HDD) products.
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